Don't let the Odin drop below 30% of its total life in the "Engine of Destruction" mission on hard difficulty.

Objectives

Main Objective | Escort Tychus to the Odin

Main Objective | Tychus must survive

Main Objective | Destroy all Dominion bases

Bonus Objective | Find devourer tissue samples (3)

Bonus Objective | Find and destroy the Loki

Mission Walkthrough

The mission starts simply, with the uncontrollable Tychus hopping aboard the impressive Odin. Select the other units and follow Tychus around, helping him fight off the enemy ground units. Right away, you should find the first of three devourer tissue samples along the northwestern wall. Stay close enough to Tychus that your Medics can keep him healed, but let him stay out front to absorb the brunt of the enemy damage. Before long, a quick cut scene takes over.

You've now got access to a typical base and the objective changes. There are five enemy bases around the area and you need to help Tychus destroy them all, but for now you've got some time to first set up shop. Tychus operates on his own schedule so you'll need to keep track of him like a child, but the good news is that he's got mega armor (displayed on the meter that's on-screen). For now, put your SCVs to work (and train more!), and put up a decent defense on your base's northern entrance as it's the only place where enemies will occasionally (rarely) attack. Fill the bunker and patrol some Marines and Medics.

You're soon introduced to a new unit type, the Wraith. Wraiths will be your primary unit in this mission so use your starport to build as many as you can muster. Tychus and the Odin are more or less capable of destroying everything in your way...except air-based enemies. The Odin has weak defenses to flying units, which is where your Wraiths come in handy. They've even got a nifty cloaking feature (press C when you have Wraiths selected) that consumes energy but will let you hop in and out of melees without losing any units. Wraiths aren't great at attacking ground units, but they can manage. Still, we suggest also building some Vultures. If you add a reactor to your factory, you can pump out Vultures with the quickness.

Soon enough, Tychus gets ants in his pants and wanders into the first of five enemy bases on his own. Do nothing. Tychus doesn't need your help taking out the first and second bases. You should instead focus on building out your army of Wraiths. After Tychus has wiped out the first Dominion base, he'll park up just outside your base and relax for a bit. This gives you plenty of time to employ the help of three or four SCVs to perform repairs on the Odin before Tychus rushes off again.

After Tychus has cleared out the second base, again send some SCVs to repair the Odin but also use some ground units to explore the former-enemy territory directly north of your base. The second devourer tissue sample can be found along the northern wall. Expect to get a few enemy units attacking your base from the northeast and be ready to take 'em out.

Follow behind Tychus as he stomps into the third base. Hang back behind him and watch for incoming air units to fight off with your Wraith fleet. After destroying air units, move your Wraiths behind Tychus to let him clean up shop. Feel free to intervene even with ground units if Tychus gets surrounded and starts losing health at an alarming rate, but otherwise Tychus should be fine. Again, use SCVs to repair Tychus when the enemies are cleared out, but be mindful of the path they take to get to Tychus. The most direct route will go through uncleared enemy territory, so be sure to lay down waypoints guiding them through safe corridors.

Follow Tychus as he moves toward the fourth base and watch the western wall for the third and final devourer tissue sample. Give Tychus the same support you've been giving and, when the area is clear of enemies (but before Tychus has destroyed all buildings), examine the area directly north of the fourth base, at the top of a large upward ramp. You'll find the enemy Loki docked on the ground. As it tries to take off, lay waste to the Loki with your airborne Wraiths.

The fifth and final Dominion base doesn't bring any surprises, and as long as you healed the Odin before letting Tychus wander in you shouldn't have a problem keeping the Odin kicking by taking out just the air units. Tychus will use a nuke to take out the final base and end the mission.